text: The CD V-700M is a Model 6/6A/6B modified with an OCD-P-108 probe fitted with an OCD-D-109 GM tube that enables the detection of alpha radiation, in order to aid in decontamination.
  ENI 6B's were most commonly used, though some Victoreens were converted as well.
  The modification involved improvements to the high voltage circuit, lowering the voltage from 900 to 575 and replacing the meter with one labeled only in Counts Per Minute.